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Finding the Fourth Proportional to 68,090.36, 102,135.53 and 21,346.88

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Solution

The fourth proportional to 68,090.36, 102,135.53 and 21,346.88 is: 32,020.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,090.36 : 102,135.53 = 21,346.88 : x
  2. Step 2: Convert to fraction form
    68,090.36/102,135.53 = 21,346.88/x
  3. Step 3: Cross multiply
    68,090.36x = 102,135.53 × 21,346.88
  4. Step 4: Simplify right side
    68,090.36x = 2,180,274,445.34
  5. Step 5: Solve for x
    x = 2,180,274,445.34/68,090.36
  6. Step 6: Final answer
    x = 32,020.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.